What are these pockets of fat under my lips that go towards my chin? (Photos)

They make indents/creases on the sides of my chin too. I'm not sure if these can be considered perioral mounds, weird buccal fat pads, recessive chin, or something else I've never heard of. I'm only 20, female, so I am interested in doing fillers first for this area. I'm planning on getting chin lipo in a few months but want to tackle this issue first. It makes me look like I have 4 chins and I still had it when I lost 40 pounds. When I smile/ talk my chin turns into 3-4 chins and I hate it.